Adding upstream version 1:2.6.4.upstream/1%2.6.4 upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-19 06:03:02 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-19 06:03:02 +0000
commit: 4897093455a2bf08f3db3a1132cc2f6f5484d77c (patch)
tree: 9e6373544263f003139431fb4b08f9766e1ed530 /utils/idmapd
parent: Initial commit. (diff)
download: nfs-utils-upstream.tar.xz
nfs-utils-upstream.zip
6 files changed, 2712 insertions, 0 deletions
diff --git a/utils/idmapd/Makefile.am b/utils/idmapd/Makefile.am
new file mode 100644
index 0000000..e09e8c5
--- /dev/null
+++ b/utils/idmapd/Makefile.am
@@ -0,0 +1,65 @@
+## Process this file with automake to produce Makefile.in
+
+man8_MANS	= idmapd.man
+
+AM_CPPFLAGS += -I ../../support/nfsidmap
+
+RPCPREFIX	= rpc.
+KPREFIX		= @kprefix@
+sbin_PROGRAMS	= idmapd
+
+EXTRA_DIST = \
+	$(man8_MANS)
+
+idmapd_SOURCES = \
+	idmapd.c \
+	\
+	nfs_idmap.h \
+	queue.h
+
+idmapd_LDADD = ../../support/nfs/libnfs.la \
+	       ../../support/nfsidmap/libnfsidmap.la \
+	       $(LIBEVENT)
+
+MAINTAINERCLEANFILES = Makefile.in
+
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+	  done)
+uninstall-hook:
+	(cd $(DESTDIR)$(sbindir) && \
+	  for p in $(sbin_PROGRAMS); do \
+	    rm -f $(RPCPREFIX)$(KPREFIX)$$p$(EXEEXT) ;\
+	  done)
+
+
+# XXX This makes some assumptions about what automake does.
+# XXX But there is no install-man-hook or install-man-local.
+install-man: install-man8 install-man-links
+uninstall-man: uninstall-man8 uninstall-man-links
+
+install-man-links:
+	(cd $(DESTDIR)$(man8dir) && \
+	  for m in $(man8_MANS) $(dist_man8_MANS) $(nodist_man8_MANS); do \
+	    inst=`echo $$m | sed -e 's/man$$/8/'`; \
+	    rm -f $(RPCPREFIX)$$inst ; \
+	    $(LN_S) $$inst $(RPCPREFIX)$$inst ; \
+	  done)
+
+uninstall-man-links:
+	(cd $(DESTDIR)$(man8dir) && \
+	  for m in $(man8_MANS) $(dist_man8_MANS) $(nodist_man8_MANS); do \
+	    inst=`echo $$m | sed -e 's/man$$/8/'`; \
+	    rm -f $(RPCPREFIX)$$inst ; \
+	  done)
+
diff --git a/utils/idmapd/Makefile.in b/utils/idmapd/Makefile.in
new file mode 100644
index 0000000..e81f630
--- /dev/null
+++ b/utils/idmapd/Makefile.in
@@ -0,0 +1,859 @@
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+	  && test -n "`echo $$list1$$list2`" \
+	  || exit 0; \
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+	  if test -f $$p; then d=; else d="$(srcdir)/"; fi; \
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+	      $$unique; \
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+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
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+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
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+
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+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
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+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
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+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
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+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
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+	done
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+check: check-am
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+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
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+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
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+
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+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+	-test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-sbinPROGRAMS \
+	mostlyclean-am
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+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/idmapd.Po
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
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+info: info-am
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+install-data-am: install-man
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+	@$(NORMAL_INSTALL)
+	$(MAKE) $(AM_MAKEFLAGS) install-exec-hook
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
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+install-info-am:
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+install-pdf: install-pdf-am
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+install-ps: install-ps-am
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+install-ps-am:
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+		-rm -f ./$(DEPDIR)/idmapd.Po
+	-rm -f Makefile
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+	mostlyclean-libtool
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+	@$(NORMAL_INSTALL)
+	$(MAKE) $(AM_MAKEFLAGS) uninstall-hook
+.MAKE: install-am install-exec-am install-strip uninstall-am
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-libtool clean-sbinPROGRAMS cscopelist-am \
+	ctags ctags-am distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-exec-hook install-html install-html-am \
+	install-info install-info-am install-man install-man8 \
+	install-pdf install-pdf-am install-ps install-ps-am \
+	install-sbinPROGRAMS install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
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+	tags tags-am uninstall uninstall-am uninstall-hook \
+	uninstall-man uninstall-man8 uninstall-sbinPROGRAMS
+
+.PRECIOUS: Makefile
+
+
+#######################################################################
+# The following allows the current practice of having
+# daemons renamed during the install to include RPCPREFIX
+# and the KPREFIX
+# This could all be done much easier with program_transform_name
+# ( program_transform_name = s/^/$(RPCPREFIX)$(KPREFIX)/ )
+# but that also renames the man pages, which the current
+# practice does not do.
+install-exec-hook:
+	(cd $(DESTDIR)$(sbindir) && \
+	  for p in $(sbin_PROGRAMS); do \
+	    mv -f $$p$(EXEEXT) $(RPCPREFIX)$(KPREFIX)$$p$(EXEEXT) ;\
+	  done)
+uninstall-hook:
+	(cd $(DESTDIR)$(sbindir) && \
+	  for p in $(sbin_PROGRAMS); do \
+	    rm -f $(RPCPREFIX)$(KPREFIX)$$p$(EXEEXT) ;\
+	  done)
+
+# XXX This makes some assumptions about what automake does.
+# XXX But there is no install-man-hook or install-man-local.
+install-man: install-man8 install-man-links
+uninstall-man: uninstall-man8 uninstall-man-links
+
+install-man-links:
+	(cd $(DESTDIR)$(man8dir) && \
+	  for m in $(man8_MANS) $(dist_man8_MANS) $(nodist_man8_MANS); do \
+	    inst=`echo $$m | sed -e 's/man$$/8/'`; \
+	    rm -f $(RPCPREFIX)$$inst ; \
+	    $(LN_S) $$inst $(RPCPREFIX)$$inst ; \
+	  done)
+
+uninstall-man-links:
+	(cd $(DESTDIR)$(man8dir) && \
+	  for m in $(man8_MANS) $(dist_man8_MANS) $(nodist_man8_MANS); do \
+	    inst=`echo $$m | sed -e 's/man$$/8/'`; \
+	    rm -f $(RPCPREFIX)$$inst ; \
+	  done)
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/utils/idmapd/idmapd.c b/utils/idmapd/idmapd.c
new file mode 100644
index 0000000..cd9a965
--- /dev/null
+++ b/utils/idmapd/idmapd.c
@@ -0,0 +1,1091 @@
+/*
+ *  idmapd.c
+ *
+ *  Userland daemon for idmap.
+ *
+ *  Copyright (c) 2002 The Regents of the University of Michigan.
+ *  All rights reserved.
+ *
+ *  Marius Aamodt Eriksen <marius@umich.edu>
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *  3. Neither the name of the University nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/inotify.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <time.h>
+
+#include "nfs_idmap.h"
+
+#include <err.h>
+#include <errno.h>
+#include <event2/event.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <inttypes.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <pwd.h>
+#include <grp.h>
+#include <limits.h>
+#include <ctype.h>
+#include <libgen.h>
+#include <nfsidmap.h>
+
+#include "xlog.h"
+#include "conffile.h"
+#include "queue.h"
+#include "nfslib.h"
+
+#ifndef PIPEFS_DIR
+#define PIPEFS_DIR  NFS_STATEDIR "/rpc_pipefs/"
+#endif
+
+#ifndef NFSD_DIR
+#define NFSD_DIR  "/proc/net/rpc"
+#endif
+
+#ifndef CLIENT_CACHE_TIMEOUT_FILE
+#define CLIENT_CACHE_TIMEOUT_FILE "/proc/sys/fs/nfs/idmap_cache_timeout"
+#endif
+
+#ifndef NFS4NOBODY_USER
+#define NFS4NOBODY_USER "nobody"
+#endif
+
+#ifndef NFS4NOBODY_GROUP
+#define NFS4NOBODY_GROUP "nobody"
+#endif
+
+/* From Niels */
+#define CONF_SAVE(w, f) do {			\
+	char *p = f;				\
+	if (p != NULL)				\
+		(w) = p;			\
+} while (0)
+
+#define IC_IDNAME 0
+#define IC_IDNAME_CHAN  NFSD_DIR "/nfs4.idtoname/channel"
+#define IC_IDNAME_FLUSH NFSD_DIR "/nfs4.idtoname/flush"
+
+#define IC_NAMEID 1
+#define IC_NAMEID_CHAN  NFSD_DIR "/nfs4.nametoid/channel"
+#define IC_NAMEID_FLUSH NFSD_DIR "/nfs4.nametoid/flush"
+
+struct idmap_client {
+	short                      ic_which;
+	char                       ic_clid[30];
+	char                      *ic_id;
+	char                       ic_path[PATH_MAX];
+	int                        ic_fd;
+	int                        ic_dirfd;
+	int                        ic_scanned;
+	struct event              *ic_event;
+	TAILQ_ENTRY(idmap_client)  ic_next;
+};
+static struct idmap_client nfsd_ic[2] = {
+{
+	.ic_which = IC_IDNAME, 
+	.ic_clid = "", 
+	.ic_id = "Server", 
+	.ic_path = IC_IDNAME_CHAN, 
+	.ic_fd = -1, 
+	.ic_dirfd = -1, 
+	.ic_scanned = 0
+},
+{
+	.ic_which = IC_NAMEID, 
+	.ic_clid = "", 
+	.ic_id = "Server", 
+	.ic_path = IC_NAMEID_CHAN, 
+	.ic_fd = -1, 
+	.ic_dirfd = -1, 
+	.ic_scanned = 0
+},
+};
+
+TAILQ_HEAD(idmap_clientq, idmap_client);
+
+static void dirscancb(int, short, void *);
+static void clntscancb(int, short, void *);
+static void svrreopen(int, short, void *);
+static int  nfsopen(struct idmap_client *);
+static void nfscb(int, short, void *);
+static void nfsdcb(int, short, void *);
+static int  addfield(char **, ssize_t *, char *);
+static int  getfield(char **, char *, size_t);
+
+static void imconv(struct idmap_client *, struct idmap_msg *);
+static void idtonameres(struct idmap_msg *);
+static void nametoidres(struct idmap_msg *);
+
+static int nfsdopen(void);
+static void nfsdclose(void);
+static int nfsdopenone(struct idmap_client *);
+static void nfsdreopen_one(struct idmap_client *);
+static void nfsdreopen(void);
+
+static int verbose = 0;
+#define DEFAULT_IDMAP_CACHE_EXPIRY 600 /* seconds */
+static int cache_entry_expiration = 0;
+static char pipefsdir[PATH_MAX];
+static char *nobodyuser, *nobodygroup;
+static uid_t nobodyuid;
+static gid_t nobodygid;
+static struct event_base *evbase = NULL;
+static bool signal_received = false;
+static int inotify_fd = -1;
+
+static void
+sig_die(int signal)
+{
+	if (signal_received) {
+		xlog_warn("forced exiting on signal %d\n", signal);
+		exit(0);
+	}
+
+	signal_received = true;
+	xlog_warn("exiting on signal %d\n", signal);
+	event_base_loopexit(evbase, NULL);
+}
+
+static int
+flush_nfsd_cache(char *path, time_t now)
+{
+	int fd;
+	char stime[32];
+
+	sprintf(stime, "%" PRId64 "\n", (int64_t)now);
+	fd = open(path, O_RDWR);
+	if (fd == -1)
+		return -1;
+	if (write(fd, stime, strlen(stime)) != (ssize_t)strlen(stime)) {
+		errx(1, "Flushing nfsd cache failed: errno %d (%s)",
+			errno, strerror(errno));
+	}
+	close(fd);
+	return 0;
+}
+
+static int
+flush_nfsd_idmap_cache(void)
+{
+	time_t now = time(NULL);
+	int ret;
+
+	ret = flush_nfsd_cache(IC_IDNAME_FLUSH, now);
+	if (ret)
+		return ret;
+	ret = flush_nfsd_cache(IC_NAMEID_FLUSH, now);
+	return ret;
+}
+
+static void usage(char *progname)
+{
+	fprintf(stderr, "Usage: %s [-hfvCS] [-p path] [-c path]\n",
+		basename(progname));
+}
+
+int
+main(int argc, char **argv)
+{
+	int wd = -1, opt, fg = 0, nfsdret = -1;
+	struct idmap_clientq icq;
+	struct event *rootdirev = NULL, *clntdirev = NULL,
+		     *svrdirev = NULL, *inotifyev = NULL;
+	struct event *initialize = NULL;
+	struct passwd *pw;
+	struct group *gr;
+	struct stat sb;
+	char *xpipefsdir = NULL;
+	int serverstart = 1, clientstart = 1;
+	int ret;
+	char *progname;
+	char *conf_path = NULL;
+
+	nobodyuser = NFS4NOBODY_USER;
+	nobodygroup = NFS4NOBODY_GROUP;
+	strlcpy(pipefsdir, PIPEFS_DIR, sizeof(pipefsdir));
+
+	if ((progname = strrchr(argv[0], '/')))
+		progname++;
+	else
+		progname = argv[0];
+	xlog_open(progname);
+
+#define GETOPTSTR "hvfd:p:U:G:c:CS"
+	opterr=0; /* Turn off error messages */
+	while ((opt = getopt(argc, argv, GETOPTSTR)) != -1) {
+		if (opt == 'c') {
+			warnx("-c is deprecated and may be removed in the "
+			      "future.  See idmapd(8).");
+			conf_path = optarg;
+		}
+		if (opt == '?') {
+			if (strchr(GETOPTSTR, optopt))
+				warnx("'-%c' option requires an argument.", optopt);
+			else
+				warnx("'-%c' is an invalid argument.", optopt);
+			usage(progname);
+			exit(1);
+		}
+	}
+	optind = 1;
+
+	if (conf_path) { /* deprecated -c option was specified */
+		if (stat(conf_path, &sb) == -1 && (errno == ENOENT || errno == EACCES)) {
+			warn("Skipping configuration file \"%s\"", conf_path);
+			conf_path = NULL;
+		} else {
+			conf_init_file(conf_path);
+			verbose = conf_get_num("General", "Verbosity", 0);
+			cache_entry_expiration = conf_get_num("General",
+					"Cache-Expiration", DEFAULT_IDMAP_CACHE_EXPIRY);
+			CONF_SAVE(xpipefsdir, conf_get_str("General", "Pipefs-Directory"));
+			if (xpipefsdir != NULL)
+				strlcpy(pipefsdir, xpipefsdir, sizeof(pipefsdir));
+			CONF_SAVE(nobodyuser, conf_get_str("Mapping", "Nobody-User"));
+			CONF_SAVE(nobodygroup, conf_get_str("Mapping", "Nobody-Group"));
+			if (conf_get_bool("General", "server-only", false))
+				clientstart = 0;
+			if (conf_get_bool("General", "client-only", false))
+				serverstart = 0;
+		}
+	} else {
+		conf_path = NFS_CONFFILE;
+		conf_init_file(conf_path);
+		CONF_SAVE(xpipefsdir, conf_get_str("General", "Pipefs-Directory"));
+		if (xpipefsdir != NULL)
+			strlcpy(pipefsdir, xpipefsdir, sizeof(pipefsdir));
+
+		conf_path = _PATH_IDMAPDCONF;
+		conf_init_file(conf_path);
+		verbose = conf_get_num("General", "Verbosity", 0);
+		cache_entry_expiration = conf_get_num("General",
+				"cache-expiration", DEFAULT_IDMAP_CACHE_EXPIRY);
+		CONF_SAVE(nobodyuser, conf_get_str("Mapping", "Nobody-User"));
+		CONF_SAVE(nobodygroup, conf_get_str("Mapping", "Nobody-Group"));
+		if (conf_get_bool("General", "server-only", false))
+			clientstart = 0;
+		if (conf_get_bool("General", "client-only", false))
+			serverstart = 0;
+	}
+
+	while ((opt = getopt(argc, argv, GETOPTSTR)) != -1)
+		switch (opt) {
+		case 'v':
+			verbose++;
+			break;
+		case 'f':
+			fg = 1;
+			break;
+		case 'p':
+			strlcpy(pipefsdir, optarg, sizeof(pipefsdir));
+			break;
+		case 'd':
+		case 'U':
+		case 'G':
+			errx(1, "the -d, -U, and -G options have been removed;"
+				" please use the configuration file instead.");
+		case 'C':
+			serverstart = 0;
+			break;
+		case 'S':
+			clientstart = 0;
+			break;
+		case 'h':
+			usage(progname);
+			exit(0);
+		default:
+			break;
+		}
+
+	if (!serverstart && !clientstart)
+		errx(1, "it is illegal to specify both -C and -S");
+
+	strncat(pipefsdir, "/nfs", sizeof(pipefsdir)-1);
+
+	daemon_init(fg);
+
+	if ((pw = getpwnam(nobodyuser)) == NULL)
+		errx(1, "Could not find user \"%s\"", nobodyuser);
+	nobodyuid = pw->pw_uid;
+
+	if ((gr = getgrnam(nobodygroup)) == NULL)
+		errx(1, "Could not find group \"%s\"", nobodygroup);
+	nobodygid = gr->gr_gid;
+
+#ifdef HAVE_NFS4_SET_DEBUG
+	nfs4_set_debug(verbose, xlog_warn);
+#endif
+	if (conf_path == NULL)
+		conf_path = _PATH_IDMAPDCONF;
+	if (nfs4_init_name_mapping(conf_path))
+		errx(1, "Unable to create name to user id mappings.");
+
+	evbase = event_base_new();
+	if (evbase == NULL)
+		errx(1, "Failed to create event base.");
+
+	if (verbose > 1)
+		xlog_warn("Expiration time is %d seconds.",
+			     cache_entry_expiration);
+	if (serverstart) {
+		nfsdret = nfsdopen();
+		if (nfsdret == 0) {
+			ret = flush_nfsd_idmap_cache();
+			if (ret)
+				xlog_err("main: Failed to flush nfsd idmap cache\n: %s", strerror(errno));
+		}
+	}
+
+	if (clientstart) {
+		struct timeval now = {
+			.tv_sec = 0,
+			.tv_usec = 0,
+		};
+
+		if (cache_entry_expiration != DEFAULT_IDMAP_CACHE_EXPIRY) {
+			int timeout_fd, len;
+			char timeout_buf[12];
+			if ((timeout_fd = open(CLIENT_CACHE_TIMEOUT_FILE,
+					       O_RDWR)) == -1) {
+				xlog_warn("Unable to open '%s' to set "
+					     "client cache expiration time "
+					     "to %d seconds\n",
+					     CLIENT_CACHE_TIMEOUT_FILE,
+					     cache_entry_expiration);
+			} else {
+				len = snprintf(timeout_buf, sizeof(timeout_buf),
+					       "%d", cache_entry_expiration);
+				if ((write(timeout_fd, timeout_buf, len)) != len)
+					xlog_warn("Error writing '%s' to "
+						     "'%s' to set client "
+						     "cache expiration time\n",
+						     timeout_buf,
+						     CLIENT_CACHE_TIMEOUT_FILE);
+				close(timeout_fd);
+			}
+		}
+
+		inotify_fd = inotify_init1(IN_NONBLOCK);
+		if (inotify_fd == -1) {
+			xlog_err("Unable to initialise inotify_init1: %s\n", strerror(errno));
+		} else {
+			wd = inotify_add_watch(inotify_fd, pipefsdir, IN_CREATE | IN_DELETE);
+			if (wd < 0)
+				xlog_err("Unable to inotify_add_watch(%s): %s\n", pipefsdir, strerror(errno));
+		}
+
+		TAILQ_INIT(&icq);
+
+		signal(SIGINT, sig_die);
+		signal(SIGTERM, sig_die);
+
+		/* These events are persistent */
+		rootdirev = evsignal_new(evbase, SIGUSR1, dirscancb, &icq);
+		if (rootdirev == NULL)
+			errx(1, "Failed to create SIGUSR1 event.");
+		evsignal_add(rootdirev, NULL);
+		clntdirev = evsignal_new(evbase, SIGUSR2, clntscancb, &icq);
+		if (clntdirev == NULL)
+			errx(1, "Failed to create SIGUSR2 event.");
+		evsignal_add(clntdirev, NULL);
+		svrdirev = evsignal_new(evbase, SIGHUP, svrreopen, NULL);
+		if (svrdirev == NULL)
+			errx(1, "Failed to create SIGHUP event.");
+		evsignal_add(svrdirev, NULL);
+		if ( wd >= 0) {
+			inotifyev = event_new(evbase, inotify_fd,
+					      EV_READ | EV_PERSIST, dirscancb, &icq);
+			if (inotifyev == NULL)
+				errx(1, "Failed to create inotify read event.");
+			event_add(inotifyev, NULL);
+		}
+
+		/* Fetch current state */
+		/* (Delay till start of event_dispatch to avoid possibly losing
+		 * a SIGUSR1 between here and the call to event_dispatch().) */
+		initialize = evtimer_new(evbase, dirscancb, &icq);
+		if (initialize == NULL)
+			errx(1, "Failed to create initialize event.");
+		evtimer_add(initialize, &now);
+	}
+
+	if (nfsdret != 0 && wd < 0)
+		xlog_err("main: Neither NFS client nor NFSd found");
+
+	daemon_ready();
+
+	if (event_base_dispatch(evbase) < 0)
+		xlog_err("main: event_dispatch returns errno %d (%s)",
+			    errno, strerror(errno));
+
+	nfs4_term_name_mapping();
+	nfsdclose();
+
+	if (inotifyev)
+		event_free(inotifyev);
+	if (inotify_fd != -1)
+		close(inotify_fd);
+
+	if (initialize)
+		event_free(initialize);
+	if (rootdirev)
+		event_free(rootdirev);
+	if (clntdirev)
+		event_free(clntdirev);
+	if (svrdirev)
+		event_free(svrdirev);
+	event_base_free(evbase);
+
+	return 0;
+}
+
+static void
+flush_inotify(int fd)
+{
+	while (true) {
+		char buf[4096] __attribute__ ((aligned(__alignof__(struct inotify_event))));
+		const struct inotify_event *ev;
+		ssize_t len;
+		char *ptr;
+
+		len = read(fd, buf, sizeof(buf));
+		if (len == -1 && errno == EINTR)
+			continue;
+
+		if (len <= 0)
+			break;
+
+		for (ptr = buf; ptr < buf + len;
+		     ptr += sizeof(struct inotify_event) + ev->len) {
+
+			ev = (const struct inotify_event *)ptr;
+			if (verbose > 2)
+				xlog_warn("pipefs inotify: wd=%i, mask=0x%08x, len=%i, name=%s",
+				  ev->wd, ev->mask, ev->len, ev->len ? ev->name : "");
+		}
+	}
+}
+
+static void
+dirscancb(int fd, short UNUSED(which), void *data)
+{
+	int nent, i;
+	struct dirent **ents;
+	struct idmap_client *ic, *nextic;
+	char path[PATH_MAX+256]; /* + sizeof(d_name) */
+	struct idmap_clientq *icq = data;
+
+	if (fd != -1)
+		flush_inotify(fd);
+
+	TAILQ_FOREACH(ic, icq, ic_next) {
+		ic->ic_scanned = 0;
+	}
+
+	nent = scandir(pipefsdir, &ents, NULL, alphasort);
+	if (nent == -1) {
+		xlog_warn("dirscancb: scandir(%s): %s", pipefsdir, strerror(errno));
+		return;
+	}
+
+	for (i = 0;  i < nent; i++) {
+		if (ents[i]->d_reclen > 4 &&
+		    strncmp(ents[i]->d_name, "clnt", 4) == 0) {
+			TAILQ_FOREACH(ic, icq, ic_next)
+			    if (strcmp(ents[i]->d_name + 4, ic->ic_clid) == 0)
+				    break;
+			if (ic != NULL)
+				goto next;
+
+			if ((ic = calloc(1, sizeof(*ic))) == NULL)
+				goto out;
+			strlcpy(ic->ic_clid, ents[i]->d_name + 4,
+			    sizeof(ic->ic_clid));
+			path[0] = '\0';
+			snprintf(path, sizeof(path), "%s/%s",
+			    pipefsdir, ents[i]->d_name);
+
+			if ((ic->ic_dirfd = open(path, O_RDONLY, 0)) == -1) {
+				if (verbose > 0)
+					xlog_warn("dirscancb: open(%s): %s", path, strerror(errno));
+				free(ic);
+				goto out;
+			}
+
+			strlcat(path, "/idmap", sizeof(path));
+			strlcpy(ic->ic_path, path, sizeof(ic->ic_path));
+
+			if (nfsopen(ic) == -1) {
+				close(ic->ic_dirfd);
+				free(ic);
+				goto out;
+			}
+
+			if (verbose > 2)
+				xlog_warn("New client: %s", ic->ic_clid);
+
+			ic->ic_id = "Client";
+
+			TAILQ_INSERT_TAIL(icq, ic, ic_next);
+
+		next:
+			ic->ic_scanned = 1;
+		}
+	}
+
+	ic = TAILQ_FIRST(icq);
+	while(ic != NULL) {
+		nextic=TAILQ_NEXT(ic, ic_next);
+		if (!ic->ic_scanned) {
+			if (ic->ic_event)
+				event_free(ic->ic_event);
+			if (ic->ic_fd != -1)
+				close(ic->ic_fd);
+			if (ic->ic_dirfd != -1)
+				close(ic->ic_dirfd);
+			TAILQ_REMOVE(icq, ic, ic_next);
+			if (verbose > 2) {
+				xlog_warn("Stale client: %s", ic->ic_clid);
+				xlog_warn("\t-> closed %s", ic->ic_path);
+			}
+			free(ic);
+		}
+		ic = nextic;
+	}
+
+out:
+	for (i = 0;  i < nent; i++)
+		free(ents[i]);
+	free(ents);
+	return;
+}
+
+static void
+svrreopen(int UNUSED(fd), short UNUSED(which), void *UNUSED(data))
+{
+	nfsdreopen();
+}
+
+static void
+clntscancb(int UNUSED(fd), short UNUSED(which), void *data)
+{
+	struct idmap_clientq *icq = data;
+	struct idmap_client *ic, *ic_next;
+
+	for (ic = TAILQ_FIRST(icq); ic != NULL; ic = ic_next) { 
+		ic_next = TAILQ_NEXT(ic, ic_next);
+		if (ic->ic_fd == -1 && nfsopen(ic) == -1) {
+			close(ic->ic_dirfd);
+			TAILQ_REMOVE(icq, ic, ic_next);
+			free(ic);
+		}
+	}
+}
+
+static void
+nfsdcb(int UNUSED(fd), short which, void *data)
+{
+	struct idmap_client *ic = data;
+	struct idmap_msg im;
+	u_char buf[IDMAP_MAXMSGSZ + 1];
+	ssize_t len;
+	ssize_t bsiz;
+	char *bp, typebuf[IDMAP_MAXMSGSZ],
+		buf1[IDMAP_MAXMSGSZ], authbuf[IDMAP_MAXMSGSZ], *p;
+	unsigned long tmp;
+
+	if (which != EV_READ)
+		return;
+
+	len = read(ic->ic_fd, buf, sizeof(buf));
+	if (len == 0)
+		/* No upcall to read; not necessarily a problem: */
+		return;
+	if (len < 0) {
+		xlog_warn("nfsdcb: read(%s) failed: errno %d (%s)",
+			     ic->ic_path, errno,
+			     strerror(errno));
+		nfsdreopen_one(ic);
+		return;
+	}
+
+	/* Get rid of newline and terminate buffer*/
+	buf[len - 1] = '\0';
+	bp = (char *)buf;
+
+	memset(&im, 0, sizeof(im));
+
+	/* Authentication name -- ignored for now*/
+	if (getfield(&bp, authbuf, sizeof(authbuf)) == -1) {
+		xlog_warn("nfsdcb: bad authentication name in upcall\n");
+		return;
+	}
+	if (getfield(&bp, typebuf, sizeof(typebuf)) == -1) {
+		xlog_warn("nfsdcb: bad type in upcall\n");
+		return;
+	}
+	if (verbose > 2)
+		xlog_warn("nfsdcb: authbuf=%s authtype=%s",
+			     authbuf, typebuf);
+
+	im.im_type = strcmp(typebuf, "user") == 0 ?
+		IDMAP_TYPE_USER : IDMAP_TYPE_GROUP;
+
+	switch (ic->ic_which) {
+	case IC_NAMEID:
+		im.im_conv = IDMAP_CONV_NAMETOID;
+		if (getfield(&bp, im.im_name, sizeof(im.im_name)) == -1) {
+			xlog_warn("nfsdcb: bad name in upcall\n");
+			return;
+		}
+		break;
+	case IC_IDNAME:
+		im.im_conv = IDMAP_CONV_IDTONAME;
+		if (getfield(&bp, buf1, sizeof(buf1)) == -1) {
+			xlog_warn("nfsdcb: bad id in upcall\n");
+			return;
+		}
+		tmp = strtoul(buf1, (char **)NULL, 10);
+		im.im_id = (u_int32_t)tmp;
+		if ((tmp == ULONG_MAX && errno == ERANGE)
+				|| (unsigned long)im.im_id != tmp) {
+			xlog_warn("nfsdcb: id '%s' too big!\n", buf1);
+			return;
+		}
+		break;
+	default:
+		xlog_warn("nfsdcb: Unknown which type %d", ic->ic_which);
+		return;
+	}
+
+	imconv(ic, &im);
+
+	buf[0] = '\0';
+	bp = (char *)buf;
+	bsiz = sizeof(buf);
+
+	/* Authentication name */
+	addfield(&bp, &bsiz, authbuf);
+
+	switch (ic->ic_which) {
+	case IC_NAMEID:
+		/* Type */
+		p = im.im_type == IDMAP_TYPE_USER ? "user" : "group";
+		addfield(&bp, &bsiz, p);
+		/* Name */
+		addfield(&bp, &bsiz, im.im_name);
+		/* expiry */
+		snprintf(buf1, sizeof(buf1), "%" PRId64,
+			 (int64_t)time(NULL) + cache_entry_expiration);
+		addfield(&bp, &bsiz, buf1);
+		/* Note that we don't want to write the id if the mapping
+		 * failed; instead, by leaving it off, we write a negative
+		 * cache entry which will result in an error returned to
+		 * the client.  We don't want a chown or setacl referring
+		 * to an unknown user to result in giving permissions to
+		 * "nobody"! */
+		if (im.im_status == IDMAP_STATUS_SUCCESS) {
+			/* ID */
+			snprintf(buf1, sizeof(buf1), "%u", im.im_id);
+			addfield(&bp, &bsiz, buf1);
+
+		}
+		//if (bsiz == sizeof(buf)) /* XXX */
+
+		bp[-1] = '\n';
+
+		break;
+	case IC_IDNAME:
+		/* Type */
+		p = im.im_type == IDMAP_TYPE_USER ? "user" : "group";
+		addfield(&bp, &bsiz, p);
+		/* ID */
+		snprintf(buf1, sizeof(buf1), "%u", im.im_id);
+		addfield(&bp, &bsiz, buf1);
+		/* expiry */
+		snprintf(buf1, sizeof(buf1), "%" PRId64,
+			 (int64_t)time(NULL) + cache_entry_expiration);
+		addfield(&bp, &bsiz, buf1);
+		/* Note we're ignoring the status field in this case; we'll
+		 * just map to nobody instead. */
+		/* Name */
+		addfield(&bp, &bsiz, im.im_name);
+
+		bp[-1] = '\n';
+
+		break;
+	default:
+		xlog_warn("nfsdcb: Unknown which type %d", ic->ic_which);
+		return;
+	}
+
+	bsiz = sizeof(buf) - bsiz;
+
+	if (atomicio((void*)write, ic->ic_fd, buf, bsiz) != bsiz)
+		xlog_warn("nfsdcb: write(%s) failed: errno %d (%s)",
+			     ic->ic_path, errno, strerror(errno));
+}
+
+static void
+imconv(struct idmap_client *ic, struct idmap_msg *im)
+{
+	u_int32_t len;
+
+	switch (im->im_conv) {
+	case IDMAP_CONV_IDTONAME:
+		idtonameres(im);
+		if (verbose > 1)
+			xlog_warn("%s %s: (%s) id \"%d\" -> name \"%s\"",
+			    ic->ic_id, ic->ic_clid,
+			    im->im_type == IDMAP_TYPE_USER ? "user" : "group",
+			    im->im_id, im->im_name);
+		break;
+	case IDMAP_CONV_NAMETOID:
+		len = strnlen(im->im_name, IDMAP_NAMESZ - 1);
+		/* Check for NULL termination just to be careful */
+		if (im->im_name[len+1] != '\0')
+			return;
+		nametoidres(im);
+		if (verbose > 1)
+			xlog_warn("%s %s: (%s) name \"%s\" -> id \"%d\"",
+			    ic->ic_id, ic->ic_clid,
+			    im->im_type == IDMAP_TYPE_USER ? "user" : "group",
+			    im->im_name, im->im_id);
+		break;
+	default:
+		xlog_warn("imconv: Invalid conversion type (%d) in message",
+			     im->im_conv);
+		im->im_status |= IDMAP_STATUS_INVALIDMSG;
+		break;
+	}
+}
+
+static void
+nfscb(int UNUSED(fd), short which, void *data)
+{
+	struct idmap_client *ic = data;
+	struct idmap_msg im;
+
+	if (which != EV_READ)
+		return;
+
+	if (atomicio(read, ic->ic_fd, &im, sizeof(im)) != sizeof(im)) {
+		if (verbose > 0)
+			xlog_warn("nfscb: read(%s): %s", ic->ic_path, strerror(errno));
+		return;
+	}
+
+	imconv(ic, &im);
+
+	/* XXX: I don't like ignoring this error in the id->name case,
+	 * but we've never returned it, and I need to check that the client
+	 * can handle it gracefully before starting to return it now. */
+
+	if (im.im_status == IDMAP_STATUS_LOOKUPFAIL)
+		im.im_status = IDMAP_STATUS_SUCCESS;
+
+	if (atomicio((void*)write, ic->ic_fd, &im, sizeof(im)) != sizeof(im))
+		xlog_warn("nfscb: write(%s): %s", ic->ic_path, strerror(errno));
+}
+
+static void
+nfsdclose_one(struct idmap_client *ic)
+{
+	if (ic->ic_event) {
+		event_free(ic->ic_event);
+		ic->ic_event = NULL;
+	}
+	if (ic->ic_fd != -1) {
+		close(ic->ic_fd);
+		ic->ic_fd = -1;
+	}
+}
+
+static void
+nfsdreopen_one(struct idmap_client *ic)
+{
+	int fd;
+
+	if (verbose > 2)
+		xlog_warn("ReOpening %s", ic->ic_path);
+
+	if ((fd = open(ic->ic_path, O_RDWR, 0)) != -1) {
+		nfsdclose_one(ic);
+
+		ic->ic_fd = fd;
+		ic->ic_event = event_new(evbase, ic->ic_fd, EV_READ | EV_PERSIST, nfsdcb, ic);
+		if (ic->ic_event == NULL) {
+			xlog_warn("nfsdreopen: Failed to create event for '%s'",
+				  ic->ic_path);
+			close(ic->ic_fd);
+			ic->ic_fd = -1;
+			return;
+		}
+		event_add(ic->ic_event, NULL);
+	} else {
+		xlog_warn("nfsdreopen: Opening '%s' failed: errno %d (%s)",
+			ic->ic_path, errno, strerror(errno));
+	}
+}
+
+static void
+nfsdreopen(void)
+{
+	nfsdreopen_one(&nfsd_ic[IC_NAMEID]);
+	nfsdreopen_one(&nfsd_ic[IC_IDNAME]);
+	return;
+}
+
+static int
+nfsdopen(void)
+{
+	return ((nfsdopenone(&nfsd_ic[IC_NAMEID]) == 0 &&
+		    nfsdopenone(&nfsd_ic[IC_IDNAME]) == 0) ? 0 : -1);
+}
+
+static void
+nfsdclose(void)
+{
+	nfsdclose_one(&nfsd_ic[IC_NAMEID]);
+	nfsdclose_one(&nfsd_ic[IC_IDNAME]);
+}
+
+static int
+nfsdopenone(struct idmap_client *ic)
+{
+	if ((ic->ic_fd = open(ic->ic_path, O_RDWR, 0)) == -1) {
+		if (verbose > 0)
+			xlog_warn("nfsdopenone: Opening %s failed: "
+				"errno %d (%s)",
+				ic->ic_path, errno, strerror(errno));
+		return (-1);
+	}
+
+	ic->ic_event = event_new(evbase, ic->ic_fd, EV_READ | EV_PERSIST, nfsdcb, ic);
+	if (ic->ic_event == NULL) {
+		if (verbose > 0)
+			xlog_warn("nfsdopenone: Create event for %s failed",
+				  ic->ic_path);
+		close(ic->ic_fd);
+		ic->ic_fd = -1;
+		return (-1);
+	}
+	event_add(ic->ic_event, NULL);
+
+	if (verbose > 2)
+		xlog_warn("Opened %s", ic->ic_path);
+
+	return (0);
+}
+
+static int
+nfsopen(struct idmap_client *ic)
+{
+	if ((ic->ic_fd = open(ic->ic_path, O_RDWR, 0)) == -1) {
+		if (errno == ENOENT) {
+			char *slash;
+
+			slash = strrchr(ic->ic_path, '/');
+			if (!slash)
+				return -1;
+			*slash = 0;
+			inotify_add_watch(inotify_fd, ic->ic_path, IN_CREATE | IN_ONLYDIR | IN_ONESHOT);
+			*slash = '/';
+			if (verbose > 2)
+				xlog_warn("Path %s not available. waiting...", ic->ic_path);
+			return -1;
+		}
+
+		xlog_warn("nfsopen: open(%s): %s", ic->ic_path, strerror(errno));
+		return (-1);
+	}
+
+	ic->ic_event = event_new(evbase, ic->ic_fd, EV_READ | EV_PERSIST, nfscb, ic);
+	if (ic->ic_event == NULL) {
+		xlog_warn("nfsopen: Create event for %s failed", ic->ic_path);
+		close(ic->ic_fd);
+		ic->ic_fd = -1;
+		return -1;
+	}
+	event_add(ic->ic_event, NULL);
+	if (verbose > 2)
+		xlog_warn("Opened %s", ic->ic_path);
+
+	return (0);
+}
+
+static void
+idtonameres(struct idmap_msg *im)
+{
+	char domain[NFS4_MAX_DOMAIN_LEN];
+	int ret = 0;
+
+	ret = nfs4_get_default_domain(NULL, domain, sizeof(domain));
+	switch (im->im_type) {
+	case IDMAP_TYPE_USER:
+		ret = nfs4_uid_to_name(im->im_id, domain, im->im_name,
+				sizeof(im->im_name));
+		if (ret) {
+			if (strlen(nobodyuser) < sizeof(im->im_name))
+				strcpy(im->im_name, nobodyuser);
+			else
+				strcpy(im->im_name, NFS4NOBODY_USER);
+		}
+		break;
+	case IDMAP_TYPE_GROUP:
+		ret = nfs4_gid_to_name(im->im_id, domain, im->im_name,
+				sizeof(im->im_name));
+		if (ret) {
+			if (strlen(nobodygroup) < sizeof(im->im_name))
+				strcpy(im->im_name, nobodygroup);
+			else
+				strcpy(im->im_name, NFS4NOBODY_GROUP);
+		}
+		break;
+	}
+	if (ret)
+		im->im_status = IDMAP_STATUS_LOOKUPFAIL;
+	else
+		im->im_status = IDMAP_STATUS_SUCCESS;
+}
+
+static void
+nametoidres(struct idmap_msg *im)
+{
+	uid_t uid;
+	gid_t gid;
+	int ret = 0;
+
+	/* XXX: move nobody stuff to library calls
+	 * (nfs4_get_nobody_user(domain), nfs4_get_nobody_group(domain)) */
+
+	im->im_status = IDMAP_STATUS_SUCCESS;
+
+	switch (im->im_type) {
+	case IDMAP_TYPE_USER:
+		ret = nfs4_name_to_uid(im->im_name, &uid);
+		im->im_id = (u_int32_t) uid;
+		if (ret) {
+			im->im_status = IDMAP_STATUS_LOOKUPFAIL;
+			im->im_id = nobodyuid;
+		}
+		return;
+	case IDMAP_TYPE_GROUP:
+		ret = nfs4_name_to_gid(im->im_name, &gid);
+		im->im_id = (u_int32_t) gid;
+		if (ret) {
+			im->im_status = IDMAP_STATUS_LOOKUPFAIL;
+			im->im_id = nobodygid;
+		}
+		return;
+	}
+}
+
+static int
+addfield(char **bpp, ssize_t *bsizp, char *fld)
+{
+	char ch, *bp = *bpp;
+	ssize_t bsiz = *bsizp;
+
+	while ((ch = *fld++) != '\0' && bsiz > 0) {
+		switch(ch) {
+		case ' ':
+		case '\t':
+		case '\n':
+		case '\\':
+			if (bsiz >= 4) {
+				bp += snprintf(bp, bsiz, "\\%03o", ch);
+				bsiz -= 4;
+			}
+			break;
+		default:
+			*bp++ = ch;
+			bsiz--;
+			break;
+		}
+	}
+
+	if (bsiz < 1 || ch != '\0')
+		return (-1);
+
+	*bp++ = ' ';
+	bsiz--;
+
+	*bpp = bp;
+	*bsizp = bsiz;
+
+	return (0);
+}
+
+static int
+getfield(char **bpp, char *fld, size_t fldsz)
+{
+	char *bp;
+	unsigned int val; 
+	int n;
+
+	while ((bp = strsep(bpp, " ")) != NULL && bp[0] == '\0')
+		;
+
+	if (bp == NULL || bp[0] == '\0' || bp[0] == '\n')
+		return (-1);
+
+	while (*bp != '\0' && fldsz > 1) {
+		if (*bp == '\\') {
+			if ((n = sscanf(bp, "\\%03o", &val)) != 1)
+				return (-1);
+			if (val > UCHAR_MAX)
+				return (-1);
+			*fld++ = val;
+			bp += 4;
+		} else {
+			*fld++ = *bp;
+			bp++;
+		}
+		fldsz--;
+	}
+
+	if (*bp != '\0')
+		return (-1);
+	*fld = '\0';
+
+	return (0);
+}
diff --git a/utils/idmapd/idmapd.man b/utils/idmapd/idmapd.man
new file mode 100644
index 0000000..8215d25
--- /dev/null
+++ b/utils/idmapd/idmapd.man
@@ -0,0 +1,134 @@
+.\"	$OpenBSD: mdoc.template,v 1.6 2001/02/03 08:22:44 niklas Exp $
+.\"
+.\" The following requests are required for all man pages.
+.Dd February 3, 2003
+.Dt RPC.IDMAPD 8
+.Os
+.Sh NAME
+.Nm rpc.idmapd
+.Nd NFSv4 ID <-> Name Mapper
+.Sh SYNOPSIS
+.\" For a program:  program [-abc] file ...
+.Nm rpc.idmapd
+.Op Fl h
+.Op Fl f
+.Op Fl v
+.Op Fl C
+.Op Fl S
+.Op Fl p Ar path
+.Op Fl c Ar path
+.Sh DESCRIPTION
+.Nm
+is the NFSv4 ID <-> name mapping daemon.  It provides functionality to
+the NFSv4 kernel client and server, to which it communicates via
+upcalls, by translating user and group IDs to names, and vice versa.
+.Pp
+The system derives the
+.Em user
+part of the string by performing a password or group lookup.
+The lookup mechanism is configured in
+.Pa /etc/idmapd.conf
+.Pp
+By default, the
+.Em domain
+part of the string is the system's DNS domain name.
+It can also be specified in
+.Pa /etc/idmapd.conf
+if the system is multi-homed,
+or if the system's DNS domain name does
+not match the name of the system's Kerberos realm.
+.Pp
+When the domain is not specified in /etc/idmapd.conf
+the local DNS server will be queried for the 
+.Sy _nfsv4idmapdomain 
+text record. If the record exists
+that will be used as the domain. When the record
+does not exist, the domain part of the DNS domain
+will used. 
+.Pp
+Note that on more recent kernels only the NFSv4 server uses
+.Nm .
+The NFSv4 client instead uses
+.Xr nfsidmap 8 ,
+and only falls back to 
+.Nm 
+if there was a problem running the
+.Xr nfsidmap 8
+program.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds_imagedir
+.It Fl h
+Display usage message.
+.It Fl v
+Increases the verbosity level (can be specified multiple times).
+.It Fl f
+Runs
+.Nm
+in the foreground and prints all output to the terminal.
+.It Fl p Ar path
+Specifies the location of the RPC pipefs to be
+.Ar path .
+The default value is \&"/var/lib/nfs/rpc_pipefs\&".
+.It Fl c Ar path
+Use configuration file
+.Ar path .
+This option is deprecated.
+.It Fl C
+Client-only: perform no idmapping for any NFS server, even if one is detected.
+.It Fl S
+Server-only: perform no idmapping for any NFS client, even if one is detected.
+.El
+.Sh CONFIGURATION FILES
+.Nm
+recognizes the following value from the
+.Sy [general]
+section of the
+.Pa /etc/nfs.conf
+configuration file:
+.Bl -tag -width Ds_imagedir
+.It Sy pipefs-directory
+Equivalent to
+.Sy -p .
+.El
+.Pp
+All other settings related to id mapping are found in the
+.Pa /etc/idmapd.conf
+configuration file.
+.Sh EXAMPLES
+.Cm rpc.idmapd -f -vvv
+.Pp
+Runs
+.Nm
+printing all
+messages to console, and with a verbosity level of 3.
+.\" This next request is for sections 2 and 3 function return values only.
+.\" .Sh RETURN VALUES
+.\" The next request is for sections 2 and 3 error and signal handling only.
+.\" .Sh ERRORS
+.\" This next request is for section 4 only.
+.\" .Sh DIAGNOSTICS
+.\" This next request is for sections 1, 6, 7 & 8 only.
+.\" .Sh ENVIRONMENT
+.Sh FILES
+.Pa /etc/idmapd.conf ,
+.Pa /etc/nfs.conf
+.Sh SEE ALSO
+.Xr idmapd.conf 5 ,
+.Xr nfs.conf 5 ,
+.Xr nfsidmap 8
+.\".Sh SEE ALSO
+.\".Xr nylon.conf 4
+.\" .Sh COMPATIBILITY
+.\".Sh STANDARDS
+.\".Sh ACKNOWLEDGEMENTS
+.Sh AUTHORS
+The
+.Nm
+software has been developed by Marius Aamodt Eriksen
+.Aq marius@citi.umich.edu .
+.\" .Sh HISTORY
+.\".Sh BUGS
+.\"Please report any bugs to Marius Aamodt Eriksen
+.\".Aq marius@monkey.org .
+.\" .Sh CAVEATS
diff --git a/utils/idmapd/nfs_idmap.h b/utils/idmapd/nfs_idmap.h
new file mode 100644
index 0000000..59bced3
--- /dev/null
+++ b/utils/idmapd/nfs_idmap.h
@@ -0,0 +1,64 @@
+/*
+ * include/linux/nfs_idmap.h
+ *
+ *  UID and GID to name mapping for clients.
+ *
+ *  Copyright (c) 2002 The Regents of the University of Michigan.
+ *  All rights reserved.
+ *
+ *  Marius Aamodt Eriksen <marius@umich.edu>
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *  3. Neither the name of the University nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef NFS_IDMAP_H
+#define NFS_IDMAP_H
+
+/* XXX from bits/utmp.h  */
+#define IDMAP_NAMESZ  128
+
+#define IDMAP_TYPE_USER  0
+#define IDMAP_TYPE_GROUP 1
+
+#define IDMAP_CONV_IDTONAME 0
+#define IDMAP_CONV_NAMETOID 1
+
+#define IDMAP_STATUS_INVALIDMSG 0x01
+#define IDMAP_STATUS_AGAIN      0x02
+#define IDMAP_STATUS_LOOKUPFAIL 0x04
+#define IDMAP_STATUS_SUCCESS    0x08
+
+#define IDMAP_MAXMSGSZ   256
+
+struct idmap_msg {
+	u_int8_t  im_type;
+	u_int8_t  im_conv;
+	char      im_name[IDMAP_NAMESZ];
+	u_int32_t im_id;
+	u_int8_t  im_status;
+};
+
+#endif /* NFS_IDMAP_H */
diff --git a/utils/idmapd/queue.h b/utils/idmapd/queue.h
new file mode 100644
index 0000000..2823fe7
--- /dev/null
+++ b/utils/idmapd/queue.h
@@ -0,0 +1,499 @@
+/*	$OpenBSD: queue.h,v 1.22 2001/06/23 04:39:35 angelos Exp $	*/
+/*	$NetBSD: queue.h,v 1.11 1996/05/16 05:17:14 mycroft Exp $	*/
+
+/*
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)queue.h	8.5 (Berkeley) 8/20/94
+ */
+
+#ifndef	_SYS_QUEUE_H_
+#define	_SYS_QUEUE_H_
+
+/*
+ * This file defines five types of data structures: singly-linked lists,
+ * lists, simple queues, tail queues, and circular queues.
+ *
+ *
+ * A singly-linked list is headed by a single forward pointer. The elements
+ * are singly linked for minimum space and pointer manipulation overhead at
+ * the expense of O(n) removal for arbitrary elements. New elements can be
+ * added to the list after an existing element or at the head of the list.
+ * Elements being removed from the head of the list should use the explicit
+ * macro for this purpose for optimum efficiency. A singly-linked list may
+ * only be traversed in the forward direction.  Singly-linked lists are ideal
+ * for applications with large datasets and few or no removals or for
+ * implementing a LIFO queue.
+ *
+ * A list is headed by a single forward pointer (or an array of forward
+ * pointers for a hash table header). The elements are doubly linked
+ * so that an arbitrary element can be removed without a need to
+ * traverse the list. New elements can be added to the list before
+ * or after an existing element or at the head of the list. A list
+ * may only be traversed in the forward direction.
+ *
+ * A simple queue is headed by a pair of pointers, one the head of the
+ * list and the other to the tail of the list. The elements are singly
+ * linked to save space, so elements can only be removed from the
+ * head of the list. New elements can be added to the list before or after
+ * an existing element, at the head of the list, or at the end of the
+ * list. A simple queue may only be traversed in the forward direction.
+ *
+ * A tail queue is headed by a pair of pointers, one to the head of the
+ * list and the other to the tail of the list. The elements are doubly
+ * linked so that an arbitrary element can be removed without a need to
+ * traverse the list. New elements can be added to the list before or
+ * after an existing element, at the head of the list, or at the end of
+ * the list. A tail queue may be traversed in either direction.
+ *
+ * A circle queue is headed by a pair of pointers, one to the head of the
+ * list and the other to the tail of the list. The elements are doubly
+ * linked so that an arbitrary element can be removed without a need to
+ * traverse the list. New elements can be added to the list before or after
+ * an existing element, at the head of the list, or at the end of the list.
+ * A circle queue may be traversed in either direction, but has a more
+ * complex end of list detection.
+ *
+ * For details on the use of these macros, see the queue(3) manual page.
+ */
+
+/*
+ * Singly-linked List definitions.
+ */
+#define SLIST_HEAD(name, type)						\
+struct name {								\
+	struct type *slh_first;	/* first element */			\
+}
+
+#define	SLIST_HEAD_INITIALIZER(head)					\
+	{ NULL }
+
+#define SLIST_ENTRY(type)						\
+struct {								\
+	struct type *sle_next;	/* next element */			\
+}
+
+/*
+ * Singly-linked List access methods.
+ */
+#define	SLIST_FIRST(head)	((head)->slh_first)
+#define	SLIST_END(head)		NULL
+#define	SLIST_EMPTY(head)	(SLIST_FIRST(head) == SLIST_END(head))
+#define	SLIST_NEXT(elm, field)	((elm)->field.sle_next)
+
+#define	SLIST_FOREACH(var, head, field)					\
+	for((var) = SLIST_FIRST(head);					\
+	    (var) != SLIST_END(head);					\
+	    (var) = SLIST_NEXT(var, field))
+
+/*
+ * Singly-linked List functions.
+ */
+#define	SLIST_INIT(head) {						\
+	SLIST_FIRST(head) = SLIST_END(head);				\
+}
+
+#define	SLIST_INSERT_AFTER(slistelm, elm, field) do {			\
+	(elm)->field.sle_next = (slistelm)->field.sle_next;		\
+	(slistelm)->field.sle_next = (elm);				\
+} while (0)
+
+#define	SLIST_INSERT_HEAD(head, elm, field) do {			\
+	(elm)->field.sle_next = (head)->slh_first;			\
+	(head)->slh_first = (elm);					\
+} while (0)
+
+#define	SLIST_REMOVE_HEAD(head, field) do {				\
+	(head)->slh_first = (head)->slh_first->field.sle_next;		\
+} while (0)
+
+#define SLIST_REMOVE(head, elm, type, field) do {			\
+	if ((head)->slh_first == (elm)) {				\
+		SLIST_REMOVE_HEAD((head), field);			\
+	}								\
+	else {								\
+		struct type *curelm = (head)->slh_first;		\
+		while( curelm->field.sle_next != (elm) )		\
+			curelm = curelm->field.sle_next;		\
+		curelm->field.sle_next =				\
+		    curelm->field.sle_next->field.sle_next;		\
+	}								\
+} while (0)
+
+/*
+ * List definitions.
+ */
+#define LIST_HEAD(name, type)						\
+struct name {								\
+	struct type *lh_first;	/* first element */			\
+}
+
+#define LIST_HEAD_INITIALIZER(head)					\
+	{ NULL }
+
+#define LIST_ENTRY(type)						\
+struct {								\
+	struct type *le_next;	/* next element */			\
+	struct type **le_prev;	/* address of previous next element */	\
+}
+
+/*
+ * List access methods
+ */
+#define	LIST_FIRST(head)		((head)->lh_first)
+#define	LIST_END(head)			NULL
+#define	LIST_EMPTY(head)		(LIST_FIRST(head) == LIST_END(head))
+#define	LIST_NEXT(elm, field)		((elm)->field.le_next)
+
+#define LIST_FOREACH(var, head, field)					\
+	for((var) = LIST_FIRST(head);					\
+	    (var)!= LIST_END(head);					\
+	    (var) = LIST_NEXT(var, field))
+
+/*
+ * List functions.
+ */
+#define	LIST_INIT(head) do {						\
+	LIST_FIRST(head) = LIST_END(head);				\
+} while (0)
+
+#define LIST_INSERT_AFTER(listelm, elm, field) do {			\
+	if (((elm)->field.le_next = (listelm)->field.le_next) != NULL)	\
+		(listelm)->field.le_next->field.le_prev =		\
+		    &(elm)->field.le_next;				\
+	(listelm)->field.le_next = (elm);				\
+	(elm)->field.le_prev = &(listelm)->field.le_next;		\
+} while (0)
+
+#define	LIST_INSERT_BEFORE(listelm, elm, field) do {			\
+	(elm)->field.le_prev = (listelm)->field.le_prev;		\
+	(elm)->field.le_next = (listelm);				\
+	*(listelm)->field.le_prev = (elm);				\
+	(listelm)->field.le_prev = &(elm)->field.le_next;		\
+} while (0)
+
+#define LIST_INSERT_HEAD(head, elm, field) do {				\
+	if (((elm)->field.le_next = (head)->lh_first) != NULL)		\
+		(head)->lh_first->field.le_prev = &(elm)->field.le_next;\
+	(head)->lh_first = (elm);					\
+	(elm)->field.le_prev = &(head)->lh_first;			\
+} while (0)
+
+#define LIST_REMOVE(elm, field) do {					\
+	if ((elm)->field.le_next != NULL)				\
+		(elm)->field.le_next->field.le_prev =			\
+		    (elm)->field.le_prev;				\
+	*(elm)->field.le_prev = (elm)->field.le_next;			\
+} while (0)
+
+#define LIST_REPLACE(elm, elm2, field) do {				\
+	if (((elm2)->field.le_next = (elm)->field.le_next) != NULL)	\
+		(elm2)->field.le_next->field.le_prev =			\
+		    &(elm2)->field.le_next;				\
+	(elm2)->field.le_prev = (elm)->field.le_prev;			\
+	*(elm2)->field.le_prev = (elm2);				\
+} while (0)
+
+/*
+ * Simple queue definitions.
+ */
+#define SIMPLEQ_HEAD(name, type)					\
+struct name {								\
+	struct type *sqh_first;	/* first element */			\
+	struct type **sqh_last;	/* addr of last next element */		\
+}
+
+#define SIMPLEQ_HEAD_INITIALIZER(head)					\
+	{ NULL, &(head).sqh_first }
+
+#define SIMPLEQ_ENTRY(type)						\
+struct {								\
+	struct type *sqe_next;	/* next element */			\
+}
+
+/*
+ * Simple queue access methods.
+ */
+#define	SIMPLEQ_FIRST(head)	    ((head)->sqh_first)
+#define	SIMPLEQ_END(head)	    NULL
+#define	SIMPLEQ_EMPTY(head)	    (SIMPLEQ_FIRST(head) == SIMPLEQ_END(head))
+#define	SIMPLEQ_NEXT(elm, field)    ((elm)->field.sqe_next)
+
+#define SIMPLEQ_FOREACH(var, head, field)				\
+	for((var) = SIMPLEQ_FIRST(head);				\
+	    (var) != SIMPLEQ_END(head);					\
+	    (var) = SIMPLEQ_NEXT(var, field))
+
+/*
+ * Simple queue functions.
+ */
+#define	SIMPLEQ_INIT(head) do {						\
+	(head)->sqh_first = NULL;					\
+	(head)->sqh_last = &(head)->sqh_first;				\
+} while (0)
+
+#define SIMPLEQ_INSERT_HEAD(head, elm, field) do {			\
+	if (((elm)->field.sqe_next = (head)->sqh_first) == NULL)	\
+		(head)->sqh_last = &(elm)->field.sqe_next;		\
+	(head)->sqh_first = (elm);					\
+} while (0)
+
+#define SIMPLEQ_INSERT_TAIL(head, elm, field) do {			\
+	(elm)->field.sqe_next = NULL;					\
+	*(head)->sqh_last = (elm);					\
+	(head)->sqh_last = &(elm)->field.sqe_next;			\
+} while (0)
+
+#define SIMPLEQ_INSERT_AFTER(head, listelm, elm, field) do {		\
+	if (((elm)->field.sqe_next = (listelm)->field.sqe_next) == NULL)\
+		(head)->sqh_last = &(elm)->field.sqe_next;		\
+	(listelm)->field.sqe_next = (elm);				\
+} while (0)
+
+#define SIMPLEQ_REMOVE_HEAD(head, elm, field) do {			\
+	if (((head)->sqh_first = (elm)->field.sqe_next) == NULL)	\
+		(head)->sqh_last = &(head)->sqh_first;			\
+} while (0)
+
+/*
+ * Tail queue definitions.
+ */
+#define TAILQ_HEAD(name, type)						\
+struct name {								\
+	struct type *tqh_first;	/* first element */			\
+	struct type **tqh_last;	/* addr of last next element */		\
+}
+
+#define TAILQ_HEAD_INITIALIZER(head)					\
+	{ NULL, &(head).tqh_first }
+
+#define TAILQ_ENTRY(type)						\
+struct {								\
+	struct type *tqe_next;	/* next element */			\
+	struct type **tqe_prev;	/* address of previous next element */	\
+}
+
+/*
+ * tail queue access methods
+ */
+#define	TAILQ_FIRST(head)		((head)->tqh_first)
+#define	TAILQ_END(head)			NULL
+#define	TAILQ_NEXT(elm, field)		((elm)->field.tqe_next)
+#define TAILQ_LAST(head, headname)					\
+	(*(((struct headname *)((head)->tqh_last))->tqh_last))
+/* XXX */
+#define TAILQ_PREV(elm, headname, field)				\
+	(*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
+#define	TAILQ_EMPTY(head)						\
+	(TAILQ_FIRST(head) == TAILQ_END(head))
+
+#define TAILQ_FOREACH(var, head, field)					\
+	for((var) = TAILQ_FIRST(head);					\
+	    (var) != TAILQ_END(head);					\
+	    (var) = TAILQ_NEXT(var, field))
+
+#define TAILQ_FOREACH_REVERSE(var, head, field, headname)		\
+	for((var) = TAILQ_LAST(head, headname);				\
+	    (var) != TAILQ_END(head);					\
+	    (var) = TAILQ_PREV(var, headname, field))
+
+/*
+ * Tail queue functions.
+ */
+#define	TAILQ_INIT(head) do {						\
+	(head)->tqh_first = NULL;					\
+	(head)->tqh_last = &(head)->tqh_first;				\
+} while (0)
+
+#define TAILQ_INSERT_HEAD(head, elm, field) do {			\
+	if (((elm)->field.tqe_next = (head)->tqh_first) != NULL)	\
+		(head)->tqh_first->field.tqe_prev =			\
+		    &(elm)->field.tqe_next;				\
+	else								\
+		(head)->tqh_last = &(elm)->field.tqe_next;		\
+	(head)->tqh_first = (elm);					\
+	(elm)->field.tqe_prev = &(head)->tqh_first;			\
+} while (0)
+
+#define TAILQ_INSERT_TAIL(head, elm, field) do {			\
+	(elm)->field.tqe_next = NULL;					\
+	(elm)->field.tqe_prev = (head)->tqh_last;			\
+	*(head)->tqh_last = (elm);					\
+	(head)->tqh_last = &(elm)->field.tqe_next;			\
+} while (0)
+
+#define TAILQ_INSERT_AFTER(head, listelm, elm, field) do {		\
+	if (((elm)->field.tqe_next = (listelm)->field.tqe_next) != NULL)\
+		(elm)->field.tqe_next->field.tqe_prev =			\
+		    &(elm)->field.tqe_next;				\
+	else								\
+		(head)->tqh_last = &(elm)->field.tqe_next;		\
+	(listelm)->field.tqe_next = (elm);				\
+	(elm)->field.tqe_prev = &(listelm)->field.tqe_next;		\
+} while (0)
+
+#define	TAILQ_INSERT_BEFORE(listelm, elm, field) do {			\
+	(elm)->field.tqe_prev = (listelm)->field.tqe_prev;		\
+	(elm)->field.tqe_next = (listelm);				\
+	*(listelm)->field.tqe_prev = (elm);				\
+	(listelm)->field.tqe_prev = &(elm)->field.tqe_next;		\
+} while (0)
+
+#define TAILQ_REMOVE(head, elm, field) do {				\
+	if (((elm)->field.tqe_next) != NULL)				\
+		(elm)->field.tqe_next->field.tqe_prev =			\
+		    (elm)->field.tqe_prev;				\
+	else								\
+		(head)->tqh_last = (elm)->field.tqe_prev;		\
+	*(elm)->field.tqe_prev = (elm)->field.tqe_next;			\
+} while (0)
+
+#define TAILQ_REPLACE(head, elm, elm2, field) do {			\
+	if (((elm2)->field.tqe_next = (elm)->field.tqe_next) != NULL)	\
+		(elm2)->field.tqe_next->field.tqe_prev =		\
+		    &(elm2)->field.tqe_next;				\
+	else								\
+		(head)->tqh_last = &(elm2)->field.tqe_next;		\
+	(elm2)->field.tqe_prev = (elm)->field.tqe_prev;			\
+	*(elm2)->field.tqe_prev = (elm2);				\
+} while (0)
+
+/*
+ * Circular queue definitions.
+ */
+#define CIRCLEQ_HEAD(name, type)					\
+struct name {								\
+	struct type *cqh_first;		/* first element */		\
+	struct type *cqh_last;		/* last element */		\
+}
+
+#define CIRCLEQ_HEAD_INITIALIZER(head)					\
+	{ CIRCLEQ_END(&head), CIRCLEQ_END(&head) }
+
+#define CIRCLEQ_ENTRY(type)						\
+struct {								\
+	struct type *cqe_next;		/* next element */		\
+	struct type *cqe_prev;		/* previous element */		\
+}
+
+/*
+ * Circular queue access methods
+ */
+#define	CIRCLEQ_FIRST(head)		((head)->cqh_first)
+#define	CIRCLEQ_LAST(head)		((head)->cqh_last)
+#define	CIRCLEQ_END(head)		((void *)(head))
+#define	CIRCLEQ_NEXT(elm, field)	((elm)->field.cqe_next)
+#define	CIRCLEQ_PREV(elm, field)	((elm)->field.cqe_prev)
+#define	CIRCLEQ_EMPTY(head)						\
+	(CIRCLEQ_FIRST(head) == CIRCLEQ_END(head))
+
+#define CIRCLEQ_FOREACH(var, head, field)				\
+	for((var) = CIRCLEQ_FIRST(head);				\
+	    (var) != CIRCLEQ_END(head);					\
+	    (var) = CIRCLEQ_NEXT(var, field))
+
+#define CIRCLEQ_FOREACH_REVERSE(var, head, field)			\
+	for((var) = CIRCLEQ_LAST(head);					\
+	    (var) != CIRCLEQ_END(head);					\
+	    (var) = CIRCLEQ_PREV(var, field))
+
+/*
+ * Circular queue functions.
+ */
+#define	CIRCLEQ_INIT(head) do {						\
+	(head)->cqh_first = CIRCLEQ_END(head);				\
+	(head)->cqh_last = CIRCLEQ_END(head);				\
+} while (0)
+
+#define CIRCLEQ_INSERT_AFTER(head, listelm, elm, field) do {		\
+	(elm)->field.cqe_next = (listelm)->field.cqe_next;		\
+	(elm)->field.cqe_prev = (listelm);				\
+	if ((listelm)->field.cqe_next == CIRCLEQ_END(head))		\
+		(head)->cqh_last = (elm);				\
+	else								\
+		(listelm)->field.cqe_next->field.cqe_prev = (elm);	\
+	(listelm)->field.cqe_next = (elm);				\
+} while (0)
+
+#define CIRCLEQ_INSERT_BEFORE(head, listelm, elm, field) do {		\
+	(elm)->field.cqe_next = (listelm);				\
+	(elm)->field.cqe_prev = (listelm)->field.cqe_prev;		\
+	if ((listelm)->field.cqe_prev == CIRCLEQ_END(head))		\
+		(head)->cqh_first = (elm);				\
+	else								\
+		(listelm)->field.cqe_prev->field.cqe_next = (elm);	\
+	(listelm)->field.cqe_prev = (elm);				\
+} while (0)
+
+#define CIRCLEQ_INSERT_HEAD(head, elm, field) do {			\
+	(elm)->field.cqe_next = (head)->cqh_first;			\
+	(elm)->field.cqe_prev = CIRCLEQ_END(head);			\
+	if ((head)->cqh_last == CIRCLEQ_END(head))			\
+		(head)->cqh_last = (elm);				\
+	else								\
+		(head)->cqh_first->field.cqe_prev = (elm);		\
+	(head)->cqh_first = (elm);					\
+} while (0)
+
+#define CIRCLEQ_INSERT_TAIL(head, elm, field) do {			\
+	(elm)->field.cqe_next = CIRCLEQ_END(head);			\
+	(elm)->field.cqe_prev = (head)->cqh_last;			\
+	if ((head)->cqh_first == CIRCLEQ_END(head))			\
+		(head)->cqh_first = (elm);				\
+	else								\
+		(head)->cqh_last->field.cqe_next = (elm);		\
+	(head)->cqh_last = (elm);					\
+} while (0)
+
+#define	CIRCLEQ_REMOVE(head, elm, field) do {				\
+	if ((elm)->field.cqe_next == CIRCLEQ_END(head))			\
+		(head)->cqh_last = (elm)->field.cqe_prev;		\
+	else								\
+		(elm)->field.cqe_next->field.cqe_prev =			\
+		    (elm)->field.cqe_prev;				\
+	if ((elm)->field.cqe_prev == CIRCLEQ_END(head))			\
+		(head)->cqh_first = (elm)->field.cqe_next;		\
+	else								\
+		(elm)->field.cqe_prev->field.cqe_next =			\
+		    (elm)->field.cqe_next;				\
+} while (0)
+
+#define CIRCLEQ_REPLACE(head, elm, elm2, field) do {			\
+	if (((elm2)->field.cqe_next = (elm)->field.cqe_next) ==		\
+	    CIRCLEQ_END(head))						\
+		(head).cqh_last = (elm2);				\
+	else								\
+		(elm2)->field.cqe_next->field.cqe_prev = (elm2);	\
+	if (((elm2)->field.cqe_prev = (elm)->field.cqe_prev) ==		\
+	    CIRCLEQ_END(head))						\
+		(head).cqh_first = (elm2);				\
+	else								\
+		(elm2)->field.cqe_prev->field.cqe_next = (elm2);	\
+} while (0)
+
+#endif	/* !_SYS_QUEUE_H_ */
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-19 06:03:02 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-19 06:03:02 +0000
commit	4897093455a2bf08f3db3a1132cc2f6f5484d77c (patch)
tree	9e6373544263f003139431fb4b08f9766e1ed530 /utils/idmapd
parent	Initial commit. (diff)
download	nfs-utils-upstream.tar.xz nfs-utils-upstream.zip